UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of June 2026

Commission File Number: 001-39316

BURNING ROCK BIOTECH LIMITED

(Registrant’s Name)

No.5 Xingdao Ring Road North, International Bio Island

Guangzhou, Guangdong

People’s Republic of China

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F ☒   Form 40-F ☐

INCORPORATION BY REFERENCE

Exhibit 99.1 (excluding the paragraphs under the heading “Non-GAAP Measures,” the table under the heading “Burning Rock Biotech Limited Reconciliations of GAAP and Non-GAAP Results,” and other discussions on non-GAAP measures therein) of this current report on Form 6-K (the “Report”) shall be incorporated by reference into the Company’s registration statements on Form F-3, which became effective on September 30, 2022 (File no. 333-264577).

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EXHIBIT INDEX

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: June 9, 2026

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Exhibit 99.1

Burning Rock Reports First Quarter 2026 Financial Results

GUANGZHOU, China, June 9, 2026—Burning Rock Biotech Limited (NASDAQ: BNR, the “Company” or “Burning Rock”), a company focused on the application of next-generation sequencing (NGS) technology in the field of precision oncology, today reported financial results for the three months ended March 31, 2026.

Recent Business Updates

First Quarter 2026 Financial Results

Revenues were RMB107.9 million (US$15.6 million) for the three months ended March 31, 2026, representing an 18.9% decrease from RMB133.1 million for the same period in 2025.

Cost of revenues was RMB29.9 million (US$4.3 million) for the three months ended March 31, 2026, representing a 16.1% decrease from RMB35.7 million for the same period in 2025.

Gross profit was RMB78.0 million (US$11.3 million) for the three months ended March 31, 2026, representing a 19.9% decrease from RMB97.4 million for the same period in 2025. Gross margin was 72.3% for the three months ended March 31, 2026, compared to 73.2% for the same period in 2025. By channel, gross margin of central laboratory business was 88.7% for the three months ended March 31, 2026, compared to 84.1% during the same period in 2025, primarily driven by a reduction in inventory write-downs; gross margin of in-hospital business was 72.9% for the three months ended March 31, 2026, compared to 76.1% during the same period in 2025, primarily attributable to a decrease in sales volume to high margin products; gross margin of pharma research and development services was 47.4% for the three months ended March 31, 2026, compared to 57.5% during the same period of 2025, primarily due to a decrease in test volume of higher-margin projects.

Non-GAAP gross profit, which excludes depreciation and amortization expenses, was RMB80.5 million (US$11.7 million) for the three months ended March 31, 2026, representing a 20.0% decrease from RMB100.7 million for the same period in 2025. Non-GAAP gross margin was 74.6% for the three months ended March 31, 2026, compared to 75.6% for the same period in 2025. For more details on these non-GAAP financial measures, please see the table captioned “Reconciliations of GAAP and Non-GAAP Results” set forth at the end of this press release.

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Operating expenses were RMB96.9 million (US$14.1 million) for the three months ended March 31, 2026, representing a 14.0% decrease from RMB112.6 million for the same period in 2025. The decrease was primarily driven by business cost and payment collection control to improve operating efficiency.

Net loss was RMB17.5 million (US$2.5 million) for the three months ended March 31, 2026, compared to RMB13.5 million for the same period in 2025.

Cash, cash equivalents and restricted cash were RMB448.7 million (US$65.1 million) as of March 31, 2026.

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Exchange Rate Information

This press release contains translations of certain Renminbi amounts into U.S. dollars at a specified rate solely for the convenience of the reader. Unless otherwise noted, all translations from Renminbi to U.S. dollars and from U.S. dollars to Renminbi are made at a rate of RMB6.8980 to US$1.00, the exchange rate on March 31, 2026, set forth in the H.10 statistical release of the Federal Reserve Board. The Company makes no representation that the Renminbi or U.S. dollars amounts referred could be converted into U.S. dollars or Renminbi, as the case may be, at any particular rate or at all.

About Burning Rock

Burning Rock Biotech Limited (NASDAQ: BNR), whose mission is to guard life via science, focuses on the application of next generation sequencing (NGS) technology in the field of precision oncology. Its business consists of i) NGS-based therapy selection testing for late-stage cancer patients, and ii) cancer early detection, which has moved beyond proof-of-concept R&D into the clinical validation stage.

For more information about Burning Rock, please visit: ir.brbiotech.com.

Safe Harbor Statement

This press release contains forward-looking statements. These statements constitute “forward-looking” statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended, and as defined in the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements can be identified by terminology such as “will,” “expects,” “anticipates,” “future,” “intends,” “plans,” “believes,” “estimates,” “target,” “confident” and similar statements. Burning Rock may also make written or oral forward-looking statements in its periodic reports to the SEC, in its annual report to shareholders, in press releases and other written materials and in oral statements made by its officers, directors or employees to third parties. Statements that are not historical facts, including statements about Burning Rock’s beliefs and expectations, are forward-looking statements. Such statements are based upon management’s current expectations and current market and operating conditions, and relate to events that involve known or unknown risks, uncertainties and other factors, all of which are difficult to predict and many of which are beyond Burning Rock’s control. Forward-looking statements involve risks, uncertainties and other factors that could cause actual results to differ materially from those contained in any such statements. All information provided in this press release is as of the date of this press release, and Burning Rock does not undertake any obligation to update any forward-looking statement as a result of new information, future events or otherwise, except as required under applicable law.

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Non-GAAP Measures

In evaluating the business, the Company considers and uses non-GAAP measures, such as non-GAAP gross profit and non-GAAP gross margin, as supplemental measures to review and assess operating performance and formulate business plans. However, the presentation of these non-GAAP financial measures is not intended to be considered in isolation or as a substitute for the financial information prepared and presented in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). These non-GAAP financial measures may be different from non-GAAP methods of accounting and reporting used by other companies, including peer companies, and therefore their comparability may be limited.

The Company defines non-GAAP gross profit as gross profit excluding depreciation and amortization. The Company defines non-GAAP gross margin as non-GAAP gross profit divided by its revenue.

The Company believes presenting non-GAAP gross profit and non-GAAP gross margin excluding non-cash impact of depreciation and amortization, in addition to the Company’s GAAP gross profit and gross margin, provides a better understanding of the underlying trends in the Company’s operating business performance.

Reconciliation of these non-GAAP financial measures to the most directly comparable U.S. GAAP measures are set forth at the end of this press release, all of which should be considered when evaluating the Company’s performance.

Contact: IR@brbiotech.com

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Selected Operating Data

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Selected Financial Data

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Burning Rock Biotech Limited

Unaudited Condensed Statements of Comprehensive Loss

(in thousands, except for number of shares and per share data)

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Burning Rock Biotech Limited

Unaudited Condensed Consolidated Balance Sheets

(In thousands)

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Burning Rock Biotech Limited

Unaudited Condensed Consolidated Balance Sheets (Continued)

(in thousands)

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Burning Rock Biotech Limited

Unaudited Condensed Statements of Cash Flows

(in thousands)

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Burning Rock Biotech Limited

Reconciliations of GAAP and Non-GAAP Results

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